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LONG-TERM INVESTMENTS - Components of long-term investments (Details) - USD ($)
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
LONG-TERM INVESTMENTS      
Share of equity loss $ 79,307 $ 48,047  
Equity investment without readily determinable fair value measured at measurement alternative 2,609,331   $ 2,560,822
Equity investment accounted for using the equity method 4,011,647   4,015,866
long-term investments $ 6,620,978   $ 6,576,688